Global distribution of whistler-mode chorus waves observed on the THEMIS spacecraft

被引：317

作者：

Li, W. ^{[1
]}

Thorne, R. M. ^{[1
]}

Angelopoulos, V. ^{[2
]}

Bortnik, J. ^{[1
]}

Cully, C. M. ^{[4
]}

Ni, B. ^{[1
]}

LeContel, O. ^{[5
]}

Roux, A.

Auster, U. ^{[3
]}

Magnes, W. ^{[6
]}

机构：

[1] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, IGPP, Los Angeles, CA 90095 USA

[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterrestr Phys, D-38106 Braunschweig, Germany

[4] Swedish Inst Space Phys, SE-75121 Uppsala, Sweden

[5] Ctr Etud Environm Terr & Planetaires, F-78140 Velizy Villacoublay, France

[6] Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

关键词：

ELECTRON ACCELERATION; RELATIVISTIC ENERGIES; MAGNETOSPHERE; MAGNETOMETER; INSTRUMENT; STORM; BOARD; FIELD;

D O I：

10.1029/2009GL037595

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Whistler mode chorus waves are receiving increased scientific attention due to their important roles in both acceleration and loss processes of radiation belt electrons. A new global survey of whistler-mode chorus waves is performed using magnetic field filter bank data from the THEMIS spacecraft with 5 probes in near-equatorial orbits. Our results confirm earlier analyses of the strong dependence of wave amplitudes on geomagnetic activity, confinement of nightside emissions to low magnetic latitudes, and extension of dayside emissions to high latitudes. An important new finding is the strong occurrence rate of chorus on the dayside at L > 7, where moderate dayside chorus is present > 10% of the time and can persist even during periods of low geomagnetic activity. Citation: Li, W., R. M. Thorne, V. Angelopoulos, J. Bortnik, C. M. Cully, B. Ni, O. LeContel, A. Roux, U. Auster, and W. Magnes (2009), Global distribution of whistler-mode chorus waves observed on the THEMIS spacecraft, Geophys. Res. Lett., 36, L09104, doi: 10.1029/2009GL037595.

引用

页数：5

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